Free sample with every order Helps stimulate blood & oxygen circulation Decreases the risk of blood clots Helps to relieve tired, achy legs and feet Compression factor:15-20mmHG Bee Hive mesh design allow great air circulation Made with 80% microfiber nylon Ebene Bio-Ray Compression Socks helps to prevent Deep Vein Thrombosis (DVT), helps to minimize pain, swelling & leg ache due to long hours of standing & sitting and to relieve tired, achy legs and feet. How to use : For 1st time user: Wear during day time for a short period (2-4 hours) Size S-M: Calf 13 - 16inch, Ankle 9 - 10.5inch, Foot 5 - 8 (US) Size L-XL: Calf 16 - 19inch, Ankle 10.5 - 12inch, Foot 9 - 12 (US)